Molding-machine.



.2 i. I #4/7315 lav-A's W. LEWIS.

MOLDING MACHINE.

APPLICATION FILED JULY 21.1911;

1,259,882. Patented Mar. 19, 1918,

2 SHEETSSHEET I.

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W. LEWIS.

MOLDING MACHINE.

APPLICATION man JULY 21. 1911.

1 ,259,882. Patented Mar. 19, 19l&

2 SHEETS-SHEET 2.

UNITED sTATnS OFFICE-r WIT-FRED LEWIS, OF HAVEBFORD, PENNSYLVANIA,ASSIGNOR TO THE TAIBOR HANU- I FACTURING COMPANY, OF PHILADELPHIA,PENNSYLVANIA, A. CORPORATION OF PENNSYLVANIA.

MOLDING-MACHINE.

Specification of Letters Patent. Patented Mar. 19, 1918 I Applicationfiled July 27, 1917. Serial No. 188,055.

To all whom it may concern:

Be it known that I, WILFRED Lnwrs, a citizen of the United States, andav resident of Haverford, in the county of Montgomery and State ofPennsylvania, have invented certain new and useful Improvements inMolding-Machines, of which the following is a specification.

The principal object of the present invention is to provide a valvelessmolding machine of extreme simplicity in construction and useful in a.variety of ways, for example as a squeezer, a shockless arring machine,or a simple jarring machine.

The'invention will be claimed at the end hereof, but will be firstdescribed in connection with the embodiment of it chosen forillustrationin the accompanying drawings, in which Figure 1, is a view principallyin section.

Fig. 2, is a similar view, .with parts omitted, illustrating amodification, and

Fig. 3, is a similar view illustrating another modification.

In the drawing 1 is a fixed cylinder having an open end and provided atits closed end 2, with a port 3. There is a piston for the cylinder 1consisting of a relatively small cap portion 4, ported as at 5, tothefixed cyl-' inder, and an interconnected relatively large tubularportion 6, of relatively large bore to form a port-recess 7 and ofsmaller bore 8 near its upper end to form, with the cap portion, aplunger chamber. 9, is a table or mold support arranged above thedescribed 'piston and it is provided with a plunger 10 arranged in theplunger chamber and with an air inlet 11 to the plunger, which latter isprovided with spaced axial passages 12 and 13; one, 12 from the airinlet 11, and the other, 13, to the plunger-chamber, and with radialairpassages 14 and 15 from the inner separated or spaced ends of the axialpassages for cooperation with the port-recess 7. The plunger is providedwith packing rings 16, 17 and 18, arranged as shown, and

the lower portion of the plunger is somewhat smaller than the upperportion of the plunger, which is a matter of convenience in respect tothe packing rings 17 and 18.

The chamferedsurfaces 19 and 20 facilitate the insertion of the plungerand its packing rings into the plunger chamber. 22, is a metal washerand 23, a, cork or equivalent cushion arranged under it and both ofthese elements are mounted .in the cap 4. 24, is a hose connection forthe passage 11. The opening 12 may be drilled, and when this is done theplug 25 can be used to close the opening; 26, is a spring arranged inthe cylinder 1 and its function is to counterbalance theweight of theparts 4 and 6,

although as will appear from the following description this spring canbe removed or omitted.

The ports 5, as well as the ports 14 and 15, are shown to consist ofradial openings or holes. the ports 5v to the lower end of the plunger10, when the latter is in its lowermost posi- The distance from thebottoms of tion, is substantially the same as the distance from thebottom of the ports 14 to the cutoflt'surface or ed consequence'of this,reliance is had upon the momentum of the parts to efi'ect the necessaryair control without the employment of valves.

In Fig. 1," 21 are means for interconnecting the parts l and 6. In Fig.2, the parts 4 and 6 are interconnected by making or from the exterlorand then plugging the ge- 27 of the recess 7. In

so casting them in one piece, and in this case parts 5*iof these holes.In Fig. 3, the hole through the part 6. is enlarged and provided with aseat 6 for supporting a flange formed on a lining or prolongation 6 ofthe part 4 so that in effect the prolongation 6 becomes a part, in thenature of a liningor bushing of the part 6, and is provided with theport-recess 7. The bushing 6 may be integrally closed at its end asshown at .12,

Fig. 2, or it may be left open for con venience in manufacture and thenclosed bya plug 29, Fig. 3. These alternate forms are really all thesame thing in principle, and other modifications obviously may be madewithout departing from the spirit of the invention,

As has been said the described parts are capable of a variety of uses aswill be readily understood by those skilled in the art and'a descriptionwill now be given of some of those uses, without intending to precludeall the uses of which the mechanism is capable and in connection with amolding machine.

The mode of operation of the described and its table 9 rise until theports are open and the passages 14 are closed. Then the air trapped inthe recess 7, passage 13, and plunger chamber escapes by the ports 5,but this air, being somewhat choked at the outlet 3, lifts the part 6,which is counterbalanced by the spring 26, and the part 9 descendingstrikes the part 6 ascending at the end of the plunger 10 and on thecushioned washer 22, so that the shock or impact takes place in the air.

In again assuming the position of the parts shown in the drawing, thecushion gives the plunger a slight initial upward tendency. Thisoperation is repeated as long as air is admitted at 24, and it is wellunderstood in the art. However, it is the simplicity of construction andthe absence of valves which is an important feature of the presentinvention.

In some instances and for some purposes it is desirable to lift thetable 9 without moving the other parts of the machine in relation toeach other. An illustration of this is when it is desired to squeeze.For this purpose, air is admitted to the port 3 with the result that thepart 6 Fig. 1, 6 Fig.

2, and 6, Fig. 3, and everything connected with and carried by it,including the mold support or table 9, are lifted, for example, towardthe head 28.

By removing the spring 26, the parts 6 Fig. 1, 6 Fig. 2, and 6, Fig. 3,are 'supported on the part 2 and then if air be admitted at 24: themachine will operate as an ordinary jarring machine and the shock willbe taken by the part 2, but even if the spring 26 be omitted, thejarring can be made shockless by sufliciently choking the outlet 3.

It may be observed that the passages 1e are somewhat smaller than thepassages 15 and by reason of this relative difference in size theoperation of the parts, as a shockless jarring machine, is improved.

What I claim is:

1. A molding machine comprising the combination of a fixed cylinderhaving an open end and ported at its closed end, a piston for saidcylinder consisting of arelatively small cap-portion ported to the fixedcylinder and an interconnected relatively large tubular portion ofrelatively large bore to form a port-recess and of smaller bore near itsupper end to form with the cap-portion a plunger chamber, a table abovethe piston and provided with a plunger arranged in the plunger chamberand with an air inlet to the plunger which latter is pro vided withspaced axial passages from the air inlet and to the plunger chamber andwith radial air passages from the inner ends of the axial passages forcooperation with said port-recess, a cushion interposed between the capand plunger, and a spring around the cap and between the fixed cylinderand the piston.

2. A molding machine comprising the combination of a fixed cylinderhaving an open end and ported at its closed end, a piston for saidcylinder consisting of a relatively small cap-portion ported to thefixed cylinder and an interconnected relatively large tubular portion ofrelatively large bore to form a port-recess and of smaller bore near itsupper end to form with the capportion a'plunger chamber, a table abovethe piston and provided with a plunger arranged in the plunger chamberand with an air inlet to the plunger which latter is provided withspaced axial passages from the air inlet and to the plunger chamber andwith radial air passages from the inner ends of the axial passages forcooperation with said port-recess, and a cushion interposed between thecap and plunger.

3. A molding machine comprising the combination of a fixed cylinderhaving an open end and ported at its closed end, a piston 'for saidcylinder consisting of a relatively small cap-portion ported to thefixed cylinder and an interconnected relatively large tubular portion ofrelatively large bare to form a port-recess'and of smaller bore near itsupper end to form with the capportion a plunger chamber, a table abovethe piston and provided with a plunger arranged in the plunger chamberand with an air inlet to the plunger which latter is provided withspaced axial passages from the air inlet and to the plun'ger chamber andwith radial air passages from the inner ends of the axial passages forcooperation with said port-recess,

4. A molding machine comprising the combination of a fixed cylinderhaving an open end and ported at its closed end, a piston for saidcylinder having a plunger chamber open at the top and closed at thebottom and provided near the bottom with a port to the cylinder andintermediate of its length with a connecting port-recess, a table abovethe piston and provided in the plunger chamber with a plunger havinintermediate of its length spaced sets 0% radial ports for cooperationwith the connecting port-recess and having axial ports, one from i 5. Amolding machine comprising the combination of a fixed cylinder .having xmediate open end and 'orted at its closed end, a piston for said cyi beropen at the top and close at the bottom and provided near the bottomwith a port to the cylinder and intermediate of its le th with aconnecting port-recess, a tablea ove the piston and provided in theplunger chamber with a plunger having intermediate of its length spacedsets of radial ports for cooperation with the connecting port- 'recessand havingaxial ports onefrom one set of radial'ports through its end tothe plunger chamber andv another from the other set of radial portsthrough the table,

6. A molding machine comprising the combination of a'fixed cylinderhaving an open end and vented at its, closed end, a pisten for saidcylinder having a plunger chamber open at the top and closed atthe-bottom and provided near the bottom with a port to the cylinderandintermediate of its length ta le with a connecting ort-recess, and aabove the piston an provided in the plunger chamber with a plunger havininterof its length spaced sets 0% radial inder having a lunger champortsfor cooperation with the connecting port-recess and having axial portsone from one set of radial ports throu h its end to 30 the plungerchamber and anot er from the other set of radial ports through thetable.

7 In a molding machine the combination. of a cylinder open at its to andclosed at its base and provided above t e base with an 35 exhaust portand above the exhaust port with a connecting port-recess, a plun rcooperating with the exhaust port and aving two sets ,ofnon-communicating radial ports cooperating with the recess and having an40 axial passage from the lower set to the cyl- 'inder and rom the upperset upward, and a table mounted on the plunger and provided through itsbody with an air channel communicatin with the upward passage.

8. Ina molding machine the combination of a plunger chamber and aplunger formed I with ports of which the walls constitute valves, and amold support carried by the plunger and having through its, body an airsupply passage communicating with said ports; substantially asdescribed.

WILFRED LEWIS.

